If your talking about coolant leaking on the passenger floor then it means your heater core is leaking and needs to be replaced.
There is pink anti freeze leaking inside of my car the passenger side what does this mean?
most likely heater core leaking
It could be the coolant overflow tank that is leaking.
the heater core is leaking or ac drain is stopped up
repair the heater hose.
Water leaking in the passenger side footwell and rear of your L200 could be due to several reasons. Common causes include a clogged or damaged sunroof drain, a faulty door seal, or a leaking windshield. Additionally, a malfunctioning heater core could cause coolant to leak, resembling water. It's advisable to inspect these areas and address any blockages or damage to prevent further leaks.
Drain coolant from engine and keep it safe and clean somewhere. Make sure to keep coolant hoses from the heater box up high to prevent coolant from leaking out. Disconnect the two coolant lines from the heater box. Make sure not to kink the lines. Undo the two bolts in the engine bay on the lower part of the heater box, and the top two bolts in the passenger footwell. Remove heater box from upper footwell engine bay area. Blower and heater matrix are now accessible.
If that water is engine coolant, the heater core is leaking.
Water in the passenger footwell of a classic Subaru Impreza STI can often come from a few sources. Common culprits include clogged or damaged drainage channels, especially around the windshield, or a malfunctioning heater core that may be leaking coolant. Additionally, worn or improperly sealed door and window weather stripping can allow rainwater to seep inside. Inspecting these areas can help identify and resolve the issue.
Leaking from the water pump at the back on the passenger side.
The heater is leaking coolant.